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COLUMNS Field Notes • Dead Reckoning Getting hard numbers on extinction rates in paradise STUART L. PIMM
On Human Nature • Primate Peekaboo Baboon doc sez: everyone likes to watch ROBERT M. SAPOLSKY
ESSAYS & COMMENT No Time for Heroes Basic cancer research gets all the glory, but known preventive measures could save more lives ROBERT N. PROCTOR
FEATURES Riders on the Storm Tornado chasers seek the birthplace of an elusive monster HOWARD B. BLUESTEIN
The Zap Trap Insecticides breed resistance. To win the war on bugs, people must learn when not to spray. RICHARD H. FFRENCH-CONSTANT
The Earth Is Their Witness Archaeology is shedding new light on the secret lives of American slaves LARRY MCKEE
REVIEWS Two Paths to the Bomb The early development of nuclear weapons took similar turns in the U.S. and the U.S.S.R. That history now suggests the difficulties any would-be bomb maker would face. WILLIAM SWEET
Books in Brief • Life Is Tough PLUS: Putting some snap into science and mathematics; ancient environmental degradation LAURENCE A. MARSCHALL
DEPARTMENTS Initial Conditions • Editor's Notebook
Peer Review Letters from Readers
Working Hypotheses • Policy Pyrotechnics and Science RODNEY W. NICHOLS
Peer Review Letters from Readers
Quanta Crisis in cosmology; a strange yeast may help fight cancer
Strange Matter Discoveries of the Future: The Pan-Universal Coffee Break ROZ CHAST
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